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Old 07-16-2013, 03:19 AM   #241
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Track size, layout, and ambient temps make a huge difference in gearing

here in Hawaii on our medium sized outdoor track I have rpm stator 12.5HT rotor 3.9fdr 65deg timing

I tried several fdr/timing combos suggested in this thread and my testing yielded the fastest times while being cool (165deg on the can) I used the rs gen 2 data logger for temps (internal temps 215-220) tested with this setup at my home track multiple times... I seen another local racer burn his HT stator and rotor setup with 3.7-6 fdr 55deg timing!

track layout makes a huge difference!
Ive tried other setups here on this thread and it just doesn't work for me.
Take whatever suggestions on this site with a grain of salt, unless you are running at the same track as other racers on this thread for gearing suggestions.
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Old 07-16-2013, 03:57 PM   #242
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Hey Warren,
needing gearing, and endbell timing advice running the D3.5 high torque (maxzilla) rotor motor in 17.5 blinky sedan. my track is roughly 120x75ish. Fairly open and flowing.

going to Go to Norcal Hobbies which is 140 x 80 in a couple weeks.
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Old 07-17-2013, 08:59 AM   #243
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Originally Posted by bagged69chevy View Post
Hey Warren,
needing gearing, and endbell timing advice running the D3.5 high torque (maxzilla) rotor motor in 17.5 blinky sedan. my track is roughly 120x75ish. Fairly open and flowing.

going to Go to Norcal Hobbies which is 140 x 80 in a couple weeks.
time it at 25(which is overall 55)gearing at 3.5fdr if you feel you need a bit more top end one tooth up but thats the best settings should have no horsepower issues and should only temp at the highest 140
good luck
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Old 07-17-2013, 09:37 AM   #244
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time it at 25(which is overall 55)gearing at 3.5fdr if you feel you need a bit more top end one tooth up but thats the best settings should have no horsepower issues and should only temp at the highest 140
good luck

So basically max timing? and im currently at 3.5, so thats perfect.. thanks warren.
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Old 07-17-2013, 09:44 AM   #245
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So basically max timing? and im currently at 3.5, so thats perfect.. thanks warren.
yep... 55 degrees of timing is all the way maxed out on the apex1 / ion4
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Old 07-17-2013, 10:38 AM   #246
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good luck get some wins guys
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Old 07-20-2013, 03:33 AM   #247
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anyone have reviews of the fantom lipos. Purchased a couple to test in the upcoming few weeks and wondering if any of you racers have any feedback.
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Old 07-20-2013, 04:35 AM   #248
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anyone have reviews of the fantom lipos. Purchased a couple to test in the upcoming few weeks and wondering if any of you racers have any feedback.
I just really started getting some time with the new 7200 7.4v lipo Fantom recently introduced. I don't have the any hard time numbers to compare with the older 6900 mah lipo this one replaces but the two fastest stock guys at our track are using it in stock TC. Will have my first race with it this weekend and I will let you know how many other top finishers are using it.
On a side note:
Fastest stock TC is using a ApexV2 HT stator with 12.5HT rotor. This will give the competition something else to complain about I'm sure, LOL
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Old 07-20-2013, 08:43 AM   #249
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Well I tried the HT/HT combo geared at a 3.8 and came off at 150ish. Bumped my gearing to a 3.6 an dropped the temps by 40*. Guess this thing likes the bigger gears.
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Old 07-20-2013, 12:10 PM   #250
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Well I tried the HT/HT combo geared at a 3.8 and came off at 150ish. Bumped my gearing to a 3.6 an dropped the temps by 40*. Guess this thing likes the bigger gears.
I'm running 3.37 on a small, but relatively fast and open track.
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Old 07-20-2013, 08:38 PM   #251
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Well I tried the HT/HT combo geared at a 3.8 and came off at 150ish. Bumped my gearing to a 3.6 an dropped the temps by 40*. Guess this thing likes the bigger gears.
The more torque the motor makes, the better it's going to be with lower gearing. By going lower you're keeping the motor in it's optimal rpm range. If the gearing doesn't match the motor, you're making it spin more rpm that it likes, or spin too big of a gear and it can't work as efficiently.
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Old 07-22-2013, 12:23 PM   #252
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A little update from the weekend. Did some running side by side again with my buddy at the outdoor asphalt track, both running the HT/HT combo apex2. Again, both running TC, same gearing, same fan, same endbell timing, and we run our cars very similarly and run almost identical laptimes... I come off the track at 180, and he comes off at 130-140.

I checked the rotor shimming, and it looked fine. I took out 1 tiny shim from both sides and made sure the rotor wasn't touching the sensor board... and it made no difference. Geared up 1 tooth, no difference... geared down one tooth... no difference.

perplexed!
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Old 07-22-2013, 12:27 PM   #253
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Originally Posted by Cpt.America View Post
A little update from the weekend. Did some running side by side again with my buddy at the outdoor asphalt track, both running the HT/HT combo apex2. Again, both running TC, same gearing, same fan, same endbell timing, and we run our cars very similarly and run almost identical laptimes... I come off the track at 180, and he comes off at 130-140.

I checked the rotor shimming, and it looked fine. I took out 1 tiny shim from both sides and made sure the rotor wasn't touching the sensor board... and it made no difference. Geared up 1 tooth, no difference... geared down one tooth... no difference.

perplexed!
Either of those two motors have dyno numbers?
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Old 07-22-2013, 12:51 PM   #254
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We are changing our rules here in Sweden from boosted 17.5 to blinky 17.5 with a max FDR of 4.0:1... Currently running a ionv4 17.5 works edition with broadpowerband rotor. Our tracks are technical with around 75feet straights. What rotor would be best suited for this motor and what timing to start with???
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Old 07-22-2013, 01:30 PM   #255
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Every 17.5 Ion4 I have has made the most power and ran the best with the 12.5HT rotor. With the FDR cap the 12.3HT rotor might be a better option. This should give you a little more RPM and will move the powerband a little higher in the rpm range.
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